Nut-lock.



UNITED STATES PATENT OFFICE. l

`JOI-IN C. REIS, OF WEST UNION, OHIO.

NUT-LOCK.

SPECIFCATO forming part of Letters Patent No. 655,118, dated July 31, 1900.

'Application filed December 7, 1899. Serial No. 739,525. (No model.)

To ctZZ whom it Magnan/cern,.-

Be it known that I, JOHN C, REIS, a citizen of the United States, residing at West nion,1

in the county of Adams and State of Ohio, have invented new and useful Improvements in Nut-Locks, of which the following is a speciiication.

My invention relates to improvements in nut-locks, and pertains to a nut-lock in which two nuts are used, one nut provided with projecting arms adapted to receive a clampingnut, all of which will be fully described here inafter, and particularly pointed out in the claims. e y

In the accompanying drawings, Figure l is a perspective view of a nut-lock embodying my invention. Fig. 2 is a'detached perspective view of the nut which is provided with the locking-arms.

invention,all of the parts being shown in their locked position. Fig. 4 is a cross-sectional view.

Referring now to theddrawings, A represents a screw-bolt of the usual construction, and B a nut adapted to be placed thereon for the purpose of clamping the object to be held between the inner face of the said nut and the inner face of the head of thebolt, as is usual in such devices.

The nut B isof a peculiar form, wherein it is provided with a plurality of outwardly-projecting arms a. The outer faces of these arms are screw-threaded and are made to taper outward-that isto say, the arms gradually grow thicker inwardly from their outer` ends for a purpose to be explained hereinafter. The inner sides or faces of these arms are made wedge-shaped to provide longitudinallyextending biting edges b, which are adapted to engage the screw-threads of the bolt A when they are forced inward in contact therewith. These arms are forced in-W ward in Contact with the screw-threads of the bolt for the purpose of locking the nut B by means of a locking-nut G. This locking-nut Gr has a transverse opening II, which is larger in diameter than the screwthreaded opening in the nut B, and consequently considerably larger `than .the bolt A, and is of sufficient di- Fig. 3 is a longitudinal vertical section of a nut-lock embodying my.

vopening in this nut G is preferably made largest at its inner end, as illustrated-that is, tapers outwardly-whereby, in combina tion with the outwardly-tapering outer surfaces of the locking-arms, the inner wedgeshaped biting edges of the locking-arms are forced inward in contact with the screwthreads of the bolt when the nut is turned thereon, as shown in Fig. 3.

In operation the nut B is screwed upon the bolt A until the object it is desired to clamp is firmly held, when the nut G is then screwed upon the locking-arms, which forces them inward in contact with the screw-threads of the bolt A,causing their longitudinal biting edges to engage the threads of the bolt and to thereby firmly hold the nut B against any relative rotation upon the bolt Aand providing a reliable and firm lock for the nut B.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-' l. A nut-lock comprising a nut provided Awith a plurality of outwardly-projecting locking-arm s having inner longitudinally-extending biting edges adapted to engage the threads upon a bolt, and a locking member embracing the said locking-armsand forcing them inward in contact with the threads of the bolt, substantially as described.

2. lA nut-lock comprisinga bolt,a nut adapted to screw upon the said bolt, said nut provided `with outwardly-projecting lockingarms, said locking-arms having screw-threaded external portions and their inner faces ta pered to a biting edge for engaging the threads of the bolt, and a locking-nut having a screwthreaded opening adapted to engage the en ing at their inner faces longitudinally-extend? ing biting` edges, and a, locking-nut adapted to receive and screw lipon the external serevfi` threaded surfaces of the locking-arms and JOHN C' REIS' 5 force them in contact with the threads oftheVV Witnesses:

bolt, substantially as described. P. S. RHOADS,

In testimony whereof I 4hmfehereut'o set l` lGEOVV. PETTIT.

my hand in the presenceof two subscribing witnesses. 

